This message is really only for those who are going to install the 4WD switch, or who already have, do to the messages length and complexity.
To begin, i followed Andyjo's instructions. (http://www.ultimatesubaru.org/forum/showthread.php?t=48865&page=12&pp=10).
Now, obviously he has a 2.2 impreza, i have a 2.2 legacy. everything still seemed to be the same. the brown wire was pin 11, however on out Fluke it read 14.5ohms, which we decided was close enough.
we spliced in the switch and hooked it up. a few things we noticed that were different:
with the switch in the "on" position, it's like the pin 11 wire was NEVER cut.. the circuit is connected and the switch may as well not be there. which means with the switch in the ON position the car is in AWD (not 4WD). the weird thing here is that if you start the car in the ON position the AT Trans Fluid Temp light flashes. this doesn't make any sense because the ON position puts the original wire back together.
this means that in order to hhave the car in 4WD the switch up be in the OFF position. think about it.. turning off the switch, cuts the selonoid wire thus locking the duty c.
with the 4WD turned ON (the switch was OFF) i went out into the parking lot and starting doing donuts. no bucking, no jumping, no pissed off subaru. i turned the switch to the ON position to double check and no bucking, no jumping, no pissed off subaru.
so now everyone's thinking that i did it wrong. well you're wrong. here's how we double checked...
we put my car about a foot up in the air (i did this all at work).
we tested the FWD fuse:
- in drive giving no gas
- front tires spin
- in drive giving it gas
- front tires spin
we tested the switch ON:
- in drive giving no gas
- front tires spin
- in drive giving it gas
-front tires spin then all 4 spin (meaning AWD)
we tested the switch OFF:
- in drive giving no gas
- all 4 spin
- in drive giving it gas
- all 4 spin
we tested the switch w/ FWD fuse
- switch on
- front tires spin
- switch off while in drive
- a thud and all 4 immediately start spining
all this proves it. the switch needs to be in the OFF position for LOCKED 4WD. this means you must drive normally with the switch in the ON position which means whenever you start up your car the AT Trans Fluid Temp light will flash, letting you know that the switch is in the CORRECT position.